Cosmological Constraints from Cosmic Shear and CMB

Details Cosmological Constraints from Cosmic Shear and CMB Cosmological Constraints from Cosmic Shear and CMB

Jun 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005iaus..225...75t&link_type=abstract

Gravitational Lensing Impact on Cosmology, IAU Symposium, vol. 225. Edited by Yannick Mellier and Georges Meylan, ISBN 052185196

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We analyse the sensitivity of cosmic shear 2-point statistics to the cosmological parameters, by using Monte Carlo Markov Chain (MCMC) methods. In particular, we investigate degeneracies among parameters and compare them to the CMB ones. Specializing on a Canada France Hawaii Telescope Legacy Survey (CFHTLS) type lensing survey and WMAP-1 year and CBI CMB data, we find cosmic shear information improves CMB cosmological parameters constraints by a factor of 1.5 - 2.5.

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